With this change, awesome.spawn() can be called with a table as its command line
argument. This gets rid of lots of problems with escaping the arguments. For
example, the following call is now possible:
awesome.spawn({ "bash", "-c", "echo \"foo\"" })
Thanks to Ignas Anikevičius for inspiring me to this.
Signed-off-by: Uli Schlachter <psychon@znc.in>
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